... wind can deposit sand. Wind acts just like water in a stream and splits to flow around obstacles. As you can see by the diagram above as one granule of sand moves it hits the ground causing more to move with it, once these hit an obstacle it forms a steep bank up against it, with a long "tail" stretching out behind where it is more sheltered from the wind. Sand Dune Succession The communities of animals and plants within the sand dune ecosystem change over time; this is referred to as succession. Embryo Dune: This dune is the first seral stage and is the most volatile of all the seral stages. This is the place where the sand dune ecosystem starts with the pioneer species of plants and animals, which are referred to as the pioneer community. An embryo dune is formed on a beach where ideally there is a lot ...

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